Question

A girl is moving along a circular path of radius 14m completes 3/4th of the circle in 5 seconds. The magnitude of speed & velocity are​

Answer 1

Answer:

When a candle burns, both physical and chemical changes occur. Physical Changes: On heating, candle wax gets melted. Since it again turns into solid wax on cooling. So, the melting of wax and vapourisation of melted wax are physical changes.